Eligibilitya) The defending Championb) Former winners of the US Masters, US Open, Open Championship and USPGA Championship,c) Former winners of the US Senior Open, US Senior PGA Championship and the Senior Open Championship for a period of 5 years from the date of the win.d) A maximum of 2 invited players nominated by the Promoter, in agreement with the European Senior Tour.e) Balance of field will be made up from players on the 2011 European Senior Tour Order of Merit issued on Monday 21 November.